CN100589278C

CN100589278C - Broadband H-shaped single polarized bob

Info

Publication number: CN100589278C
Application number: CN200510101347A
Authority: CN
Inventors: 卜斌龙; 孙善球; 范颂东; 冯春海; 蒋克勇
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2010-02-10
Anticipated expiration: 2025-11-16
Also published as: CN1828998A

Abstract

The present invention relates to a broadband I-shaped monopolization oscillator. It contains first oscillator, second oscillator, feeder apparatus, parallel double plate and double wire between doublearm of each oscillator, wherein feeder apparatus including power feed piece and additional concentric line, double wire between double arm of each oscillator extented to parallel double plate, respectively to form first balancer and second balancer for countervailing component reactance of two oscillators, feeding point of said feeder apparatus set on central position of parallel double plate wire, power feed piece set on a parallel edge, inside and outside conductor of concentric line respectively connected on power feed piece and another parallel edge of parallel double plate wire. The present invention realizes broadband function under metallic reflection plate size unchanged condition with high front-to-back ratio radiation performance.

Description

Broadband H-shaped single polarized bob

[technical field]

The present invention relates to a kind of oscillator, especially a kind of broadband H-shaped single polarized bob.

[background technology]

In mobile communication base station and direct discharging station, usually need the antenna of a kind of broadband height front and back than medium-width wave beam, such as: beamwidth is respectively 90 °, 65 ° and 32 °, CDMA and GSM are shared, DCS and PCS are shared, and PCS and UMTS are shared, and DCS, PCS and UMTS are shared.The common antenna form that can satisfy above-mentioned radiation characteristic requirement has corner-reflector antenna and logarithm periodic antenna, but there is weak point in it, is exactly that cost is higher, and size is bigger.

In order to improve above-mentioned deficiency, the insider finds by analyzing: the distance of about 0.25 wavelength is placed a half-wavelength symmetrical dipole above infinitely-great metallic reflection plate, its H ground roll beam width is about 75～80 °, suitably adjust the oscillator height, beamwidth changes to some extent, but excursion is little, and H ground roll beamwidth band is difficult to adjust to 90 ± 8 ° or 65 ± 6 ° of scopes.If the reflecting plate restriction is less than 0.8 wavelength, front and back are difficult to control to below 28～30dB than index.

For H ground roll beam width and the high front and back ratio of realizing stipulating, be subjected to the inspiration of 2L double loop antenna, two symmetrical dipoles are coupled together in same plane by parallel wire, adopt balanced feeding just to constitute H-shaped single polarized bob at the parallel wire mid point, by the impedance of adjustment parallel wire and the size of symmetrical dipole, can realize and 50 ohms impedance match at distributing point.

This H-shaped single polarized bob (referring to Fig. 1) that has improved is simple in structure, and distributing point is few, realizes H ground roll beam width and front and back than control than being easier to, and part has overcome the deficiency of reflector antenna and logarithm periodic antenna.But, find in the practice, because its structure standing-wave ratio is about about 10% less than 1.30 bandwidth, can only satisfy CDMA, GSM, DCS, the work of UMTS one-segment, but can not satisfy CDMA and GSM824～960MHz double frequency shared, DCS1710～1880MHz, PCS1850～1990MHz and UMTS1920～2170MHz three are frequently shared or wherein shared in twos.

In sum, make radiating element with broadband H-shaped single polarized bob, simple and reliable, cost is also lower, but controls than being difficult to before and after when the metallic reflection plate is limited, and common half-wavelength symmetrical dipole can not be realized broadband operation.And utilize many row's arrays can control the front and back ratio, and can cause feeding network comparatively complicated again, cost is also higher relatively.

[summary of the invention]

Purpose of the present invention will overcome above-mentioned deficiency exactly, provides a kind of and realize broadband operation in the certain space scope, realizes that higher front and back are than radiance and the relatively cheap broadband H-shaped single polarized bob of cost.

The objective of the invention is to be achieved through the following technical solutions: this broadband H-shaped single polarized bob comprises the two-conductor line between the first oscillator unit, the second oscillator unit, feeder equipment, parallel double printed line and each oscillator unit both arms, pass through the parallel connection of parallel double printed line between two oscillator units, feeder equipment comprises feed tab and the coaxial line that adds, wherein, two-conductor line between each oscillator unit both arms is extended into the parallel double plate, form first balancer and second balancer respectively, to offset the reactive component of two oscillator units; The distributing point of described feeder equipment is arranged on the center of parallel double printed line, and feed tab is arranged on the parallel edges of parallel double printed line, and the internal and external conductor of coaxial line then is connected on another parallel edges of feed tab and parallel double printed line.

Compared with prior art, the invention has the advantages that: under the constant substantially situation of metallic reflection board size, realize wide band function, realize high before and after the width of cloth of ratio penetrate performance, simultaneously, the new structure of transforming is also comparatively simple and easy, makes things convenient for installation and maintenance, saves cost.

The present invention is further illustrated below in conjunction with drawings and Examples:

[description of drawings]

Fig. 1 is the perspective view of a kind of I shape oscillator in the prior art;

Fig. 2 is the perspective view of first embodiment of the invention;

Fig. 3 is the perspective view of second embodiment of the invention;

Fig. 4 is the perspective view of third embodiment of the invention;

Fig. 5 is the matching properties curve of third embodiment of the invention at 1.7～2.2GHz;

Fig. 6 is applied in 1.7～2.2GHz single polarization, the 65 degree antennas for third embodiment of the invention;

Fig. 7, Fig. 8, Fig. 9 are the radiation characteristic curve of antenna shown in Figure 6.

[embodiment]

See also Fig. 2, broadband H-shaped single polarized bob of the present invention comprises the 1A of first oscillator unit, second oscillator unit 1B, the first balancer 2A, the second balancer 2B, by two parallel edges 3A1, the parallel double printed line 3A that 3A2 forms, the feeder equipment of forming by feed tab 4A1 and coaxial line 4A2.Wherein the first balancer 2A and the second balancer 2B are by the 1A of two oscillators unit, and the two-conductor line between the 1B both arms (not label) extends into the parallel double plate and gets.Feed tab is arranged on 3A1 on the parallel edges of parallel double printed line 3A.Offset the part reactive component of the 1A of first oscillator unit earlier with the first balancer 2A, the second balancer 2B offsets the part reactive component of the 1B of second oscillator unit, to eliminate two 1A of oscillator unit of part reactive component then by parallel double printed line 3A, the 1B parallel connection, center position at parallel double printed line 3A, the internal and external conductor of coaxial line 4A2 is connected on another parallel edges 3A2 of feed tab 4A1 and parallel double printed line 3A and makes this parallel edges 3A2 become the distributing point that is connected feeder equipment, the impedance and the feed tab 4A1 that suitably adjust parallel double printed line 3A realize the broadband coupling.

See also Fig. 3, it is second kind of execution mode of the present invention, itself and the first example difference are: described parallel double printed line 3A ' heart feed place therein extends one the 3rd balancer 5A ' downwards, the internal and external conductor of coaxial line 4A2 ' is connected to feed tab 4A1 ' and the last feed of the 3rd balancer 5A ', also the internal and external conductor of coaxial line 4A2 ' can be connected to two composing plate 5A1 ' that form the 3rd balancer 5A ', 5A2 ' goes up feed, realizes the broadband coupling.

See also Fig. 4, it is the third execution mode of the present invention, itself and the first embodiment difference are: will be by each oscillator 1A "; 1B " two-conductor line between the both arms (not label) prolongs the first balancer 2A of gained " and the second balancer 2B ", parallel double printed line 3A " be designed to holistic broadband balancer 6A ", broadband balancer 6A " side plate 6A1 " feed tab 4A1 is set "; with coaxial line or 4A2 " internal and external conductor be connected to feed tab 4A1 " and another side plate of broadband balancer 6A2 " center position, realize the broadband coupling.Welding is installed for convenience, also can be at broadband balancer 6A " the top stay a back-up block 7A ", bottom design one technology groove 8A ".

Observe the matching properties curve of third embodiment of the invention at 1.7～2.2GHz, its performance obviously is improved as can be known, as shown in Figure 5.

See also Fig. 6, oscillator of the present invention is applied in 1.7～2.2GHz single polarization, the 65 degree antennas, a plurality of broadband H-shaped single polarized bobs are equidistant to be arranged on the metallic reflection plate, and by coaxial line cooperation feed, the radiation characteristic curve of the formed antenna of this application sees also Fig. 7, Fig. 8 and shown in Figure 9.

Because realize that the mode of balanced feeding has been known manner, in existing application, also available other of the coaxial line of indication of the present invention has the mode of equivalent structure such as parallel wire substitutes, so to not giving unnecessary details separately at this with the application example of other structure of coaxial line equivalence.

Adopting the present invention is that 90 °, 65 ° and 32 ° of single-polarized antenna bandwidth of operation surpass 25% as the horizontal beam width of radiating element, at CDMA824～896MHz and GSM870～960MHz double frequency shared, when DCS1710～1880MHz, PCS1850～1990MHz and UMTS1920～2170MHz three frequencies were shared or wherein shared in twos, typical electric index was as follows:

Standing-wave ratio is less than 1.25;

The horizontal plane beamwidth is 90 ° ± 8 ° and is better than 28dB around the time.

The horizontal plane beamwidth is 65 ° ± 6 ° and is better than 30dB around the time.

The horizontal plane beamwidth is 32 ° ± 4 ° and is better than 33dB around the time.

The discreteness of beamwidth was smaller when one-segment was used, and reached 90 ° ± 5 °, 65 ° ± 4 ° and 32 ° ± 3 ° respectively.

This shows that the present invention can realize wide band function under the constant substantially situation of metallic reflection board size, realize high before and after the width of cloth of ratio penetrate performance, simultaneously, the new structure of transforming is also comparatively simple and easy, conveniently pulls gold and becomes a useful person, material-saving is economized this, especially makes things convenient for installation and maintenance.

Claims

1, a kind of broadband H-shaped single polarized bob, comprise the two-conductor line between the first oscillator unit, the second oscillator unit, feeder equipment, parallel double printed line and each oscillator unit both arms, pass through the parallel connection of parallel double printed line between two oscillator units, feeder equipment comprises feed tab and the coaxial line that adds, it is characterized in that: the two-conductor line between each oscillator unit both arms is extended into the parallel double plate by the longitudinally along oscillator unit both arms, form first balancer and second balancer respectively, to offset the reactive component of two oscillator units; The distributing point of described feeder equipment is arranged on the center of parallel double printed line, and feed tab is arranged on the parallel edges of parallel double printed line, and the internal and external conductor of coaxial line then is connected on another parallel edges of feed tab and parallel double printed line.

2, broadband H-shaped single polarized bob according to claim 1 is characterized in that: two-conductor line between described each oscillator unit both arms and parallel double printed line are processed in aggregates and extend into the parallel double plate downwards, form the broadband balancer.

3, broadband H-shaped single polarized bob according to claim 2 is characterized in that: the top of described broadband balancer is provided with back-up block, and the bottom is then dug and is provided with technology groove.

4, a kind of broadband H-shaped single polarized bob, comprise the two-conductor line between the first oscillator unit, the second oscillator unit, feeder equipment, parallel double printed line and each oscillator unit both arms, pass through the parallel connection of parallel double printed line between two oscillator units, feeder equipment comprises feed tab and the coaxial line that adds, it is characterized in that: the two-conductor line between each oscillator unit both arms is extended into the parallel double plate by the longitudinally along oscillator unit both arms, form first balancer and second balancer respectively, to offset the reactive component of two oscillator units; Parallel double printed line center position extends the composing plate of two bottom interconnection downwards to form the 3rd balancer; The distributing point of described feeder equipment is arranged on the center of parallel double printed line, and feed tab is arranged on the parallel edges of parallel double printed line, and the internal and external conductor of coaxial line then is connected on feed tab and the 3rd balancer and realizes balanced feeding.

5, a kind of broadband H-shaped single polarized bob, comprise the two-conductor line between the first oscillator unit, the second oscillator unit, feeder equipment, parallel double printed line and each oscillator unit both arms, pass through the parallel connection of parallel double printed line between two oscillator units, feeder equipment comprises a coaxial line that adds, it is characterized in that: the two-conductor line between each oscillator unit both arms is extended into the parallel double plate by the longitudinally along oscillator unit both arms, form first balancer and second balancer respectively, to offset the reactive component of two oscillator units; Parallel double printed line center position extends the composing plate of two bottom interconnection downwards to form the 3rd balancer; The internal and external conductor of the coaxial line of described feeder equipment then is connected with two composing plates of the 3rd balancer respectively realizes balanced feeding.